Calculate the mass of 0.100 mol of calcium

Answer:

When Sedimentary rocks are buried deep beneath the Earth's surface, great pressure and tremendous heat change these rocks into new rocks containing different minerals. These are Metamorphic rocks.

Explanation:

Answer: 45

Explanation:

mass number = number of protons and neutrons

atomic number = number of protons

to find neutrons subtract atomic number from mass number

so 80 - 35 = 45 neutrons

Answer:kj

Explanation:nnn

Answer: Other characteristics of the noble gases are that they all conduct electricity, fluoresce, are odorless and colorless, and are used in many conditions when a stable element is needed to maintain a safe and constant environment. This chemical series contains helium, neon, argon, krypton, xenon, and radon.

Answer:

D:2

Explanation:

H is hydrogen, and the subscript represents the amount of atoms it has so H2SO is two hydrogens

Answer:

D. 2 I think, not 100% sure.

Answer:

Explanation:

so, limiting reactants are the reactant which limit the continuing of the reaction or in simple word they are the element that run out first and are totally consumed

equation :

2koh+h2so4⇒ k2so4 +2h2o

if we have 4 mol of h2so4 and 3 mol of 2koh

                 number of produced moles of k2so4 on consuming all :

h2so4 ⇒ k2so4

1 mol          1 mol

4 mol            ?mol

no of mol of k2so4 if all h2so4 is consumed 4 mol

2koh⇒ k2so4

2 mol       1 mol

3 mol         ?mol

no of mol of k2so4 if we consume all koh = 1.5 mol

since the koh produces less mol on consuming it all

the koh is the limiting reactant

Answer:

Explanation:

Aside the boiling point of water, another colligative property that can be used to identify pure water (or not) is the freezing point. Water freezes at 0 °C, but with the presence of impurities, there is a freezing point depression of the water. Thus, if the water is not pure, the liquid could freeze at a temperature lower than 0 °C (with a negative sign like -8 °C).

Answer:

reuse

Explanation:

Answer:

NH₄Cl    ⇄      NH₃   +    HCl

Explanation:

The formula equation shows a reversible reaction is:

NH₄Cl(s) ⇄ NH₃(g) + HCl(g)

Let's consider which formula equation shows a reversible reaction.

The single arrow indicates that this is an irreversible reaction.

The single arrow indicates that this is an irreversible reaction.

The double arrow indicates that this is a reversible reaction.

The single arrow indicates that this is an irreversible reaction.

The formula equation shows a reversible reaction is:

NH₄Cl(s) ⇄ NH₃(g) + HCl(g)

Learn more about reversible reactions here: https://brainly.com/question/11114490

Answer: Crocodiles and tigers both have four legs

Explanation: Even when sharks and tigers are both meat eaters, the question is about similarities between tigers and crocodiles, so D is out. A is about crocodiles and sharks, so it's out also. B suits for sharks too, so it's out too. C is the most suitable answer, because both animals have four legs, which means that they belong to the group of quadrupede animals.

Answer:

Crocodiles and tigers both have four legs

Explanation:

Answer:

The value of Equilibrium constant for the given reaction is 0.089

Explanation:

The given data shows the following reaction

    H2O (g)  + Cl2O (g) ⇄ 2 HClO (g)

The above reaction is in equilibrium.

Equilibrium constant K  = [tex]\frac{[C]^c*[D]^d}{[A]^a*[B]^b}[/tex]

for the reaction

aA+bB ⇆ cC +dD

so

K  = [tex]\frac{[HClO]^2}{[H2O][Cl2O]}[/tex]

    = [tex]\frac{[0.023]^2}{[0.077][0.077]}[/tex] = 23*23/77*77 = 0.089

Therefore the value of Equilibrium constant for the given reaction is 0.089

Answer:

The value of Equilibrium constant for the given reaction is 0.089

Answer:

Ca, Mg, Zn, Cu

Explanation:

Refer to the Reactivity Series where each metal is more reactive than others.

Answer:

A lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow). This can occur only when the Sun, Earth, and Moon are aligned exactly with the Earth in the middle. Hence, a lunar eclipse can only occur the full moon phase

Explanation:

please mark me brainlist

Answer:

A sun

Explanation:

because sun has heat and gives light

Answer:

9 moles of O²

Explanation:

Hope this helped,

Philip

Brainliest always appreciated! <3

Answer:

ight i'll answer both rq

Explanation:

a. Rub the magnet along the nail or knitting needle. Now try picking up the paper clip or

tack. Could your nail pick it up? How many can it pick up at once?

after rubbing the magnet with the nail, it could pick up 7 small paper clips.

b. Now try to make your magnet stronger by rubbing the magnet along the nail or knitting

needle for a longer time. Rub only in one direction, not back and forth. This will increase

the number of atoms that line up with the magnet. Try to pick up paper clips or

thumbtacks. How many can it pick up now?

after rubbing it a second time but for a longer period, it could pick up around 10, almost lifting the 11th.

Answer:

A. After rubbing the magnet with the nail, it could pick up 7 small paper clips.

B. After rubbing it a second time but for a longer period, it could pick up around 10 small paper clips, almost lifting the 11th one.

presence of heat can change solid tu liquid

and liquid to gas

Answer:

Nitrogen (ii) oxide

Explanation:

To know the IUPAC name for NO, we shall determine the oxidation number of N in NO.

NOTE: The oxidation number of oxygen (O) is always – 2.

Thus the oxidation number of N in NO can be obtained as follow:

N + O = 0 (ground state)

N + (– 2) = 0

N – 2 = 0

Collect like terms

N = 0 + 2

N = +2

Thus, the oxidation number of Nitrogen (N) in NO is +2.

Therefore, the IUPAC name for NO is Nitrogen (ii) oxide

Answer:

nitrogen monoxide

Explanation:

for those taking quiz on edge

Answer:

Boiling point is one of the answers

Answer:

Noble gases

Explanation:

Answer:

Do not try to re-light or handle malfunctioning fireworks. Soak both spent and unused fireworks in water for a few hours before discarding.

Answer:

Li2O+H2O---->(2)LiOH

Explanation:

you have to balance the equation and not all the blanks have to be filled all the time but if it makes it easier for you in the first 2 question marks you can put a 1 which isnt necessary but if ur a visual person it will help.

hope this helps im litterally learning the same thing as u lol

Answer:

1,1,2

Explanation:

this was correct for me, if it wasnt correct check if youre on the right question

Answer:

first help me plz plz

Explanation:

coz  i hate chemistry

5. Name the compound which contain Strontium, Fluorine, and Oxygen.

Options:

Strontium fluorate

Strontium fluoride

Strontium chlorate

Strontium fluorine

Answer:

Explanation:

Na₂CO₃ (aq)+ MgCl₂ (aq) =  MgCO₃(s)  +2NaCl (aq)

MgCO₃(s) is the precipitate .

Ionic equation

2 Na⁺¹ + CO₃⁻² + Mg⁺² + 2 Cl⁻¹ = MgCO₃(s) +2 Na⁺ + 2 Cl⁻

net ionic equation

Mg⁺² + CO₃⁻² = MgCO₃ (s) .

The precipitate formed in the reaction has been the magnesium carbonate salt.  The net ionic equation will be: [tex]\rm Mg^2^+\;+\;CO_3^2^-\;\rightarrow\;MgCO_3[/tex].

The mixture of sodium carbonate and magnesium chlorate has been given as:

[tex]\rm Na_2CO_3\;+\;MgCl_2\;\rightarrow\;MgCO_3\;+\;NaCl[/tex]

[tex]\rm Na_2CO_3\;(aq)\;+\;MgCl_2\;(aq)\;\rightarrow\;MgCO_3\;(s)\;+\;2\;NaCl\;(aq)[/tex]

[tex]\rm Na_2CO_3\;\rightarrow\;2\;Na^+\;+\;CO_3^2^-[/tex]

[tex]\rm MgCl_2\;\rightarrow\;Mg^2^+\;+\;2\;Cl^-[/tex]

[tex]\rm MgCO_3\;\rightarrow\;Mg^2^+\;+\;CO_3^2^-[/tex]

[tex]\rm NaCl\;\rightarrow\;Na^+\;+\;Cl^-[/tex]

The ionic equation for the reaction will be:

[tex]\rm 2\;Na^+\;+\;CO_3^2^-\;+\;Mg^2^+\;+\;2\;Cl^-\;\rightarrow\;MgCO_3\;+\;2\;Na^+\;+\;2\;Cl^-[/tex]

[tex]\rm Mg^2^+\;+\;CO_3^2^-\;\rightarrow\;MgCO_3[/tex]

For more information about the net ionic equation, refer to the link:

https://brainly.com/question/22885959

Answer:

I believe- If there is more metal for the magnet to reach for, then the strength will grow but it may be harder to pick up off of a surface depending on the weight of the nail. If it is a light nail, it would be more efficient for a quick result in having the magnet to pick it up

Explanation:

Answer:

Ferromagnetic materials make the magnet stronger than non-ferromagnetic materials like paper, wood, or air. A wider nail will make the magnet stronger. Making the nail longer will not make the magnet stronger, unless you also add more turns to the coil.

Explanation:

I hope this helps!!

Answer:

A

Explanation The number of energy levels (n) increases, and so does the distance between the nucleus and the outermost orbital. The increased distance and the increased shielding weaken the nuclear attraction, and so an atom can't attract electrons as strongly.

Answer:

Conductive heat transfer is most likely responsible for the cooling of the magma

Explanation:

The Earth's core is continuously cooling due to human's digging, allowing for more space and heat escape from the Earth's core. All magma closer to the core would have its heat absorbed by the core, hereby increasing its coolness.

This heat transfer process is common to conduction.

I hope this was helpful.

Answer:

i agree

Explanation: